Influence of Prefabricated Fissure Combinations on Strength and Failure Characteristics of Rock-Like Specimens under Uniaxial Compression

Abstract Owing to the uncertainty in the rock formation process, there are different forms of fissure combinations that significantly influence the stability of engineering. In this paper, the peak strength and failure characteristics of rock-like materials with four types of double prefabricated fi...

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Veröffentlicht in:International journal of geomechanics 2023-02, Vol.23 (2)
Hauptverfasser: Wang, Kezhong, Zhang, Chun, Gao, Yaohui, Chen, Hengjin, Xie, Tian
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container_title International journal of geomechanics
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creator Wang, Kezhong
Zhang, Chun
Gao, Yaohui
Chen, Hengjin
Xie, Tian
description Abstract Owing to the uncertainty in the rock formation process, there are different forms of fissure combinations that significantly influence the stability of engineering. In this paper, the peak strength and failure characteristics of rock-like materials with four types of double prefabricated fissure combinations was investigated by combining similar material tests of the digital image correlation (DIC) techniques and discrete-element numerical method (PFC2D). With reference to the experimental observation of crack initiation and propagation, the prefabricated fissure combination effect was analyzed by varying the fissure angle and its combination type. The results indicated that the mechanical properties of the specimen with prefabricated fissures were affected by the fissure inclination angle. When the double fissure inclination angles were 45°, the total fracture length was longest and the peak strength and the proportion of dissipated energy were smallest. It can be obtained that when the fissure inclination angle reached 45°, the effect of the prefabricated fissure combination was maximum. Except for the specimens whose fissure inclination angles had 90° cracks that processed along a perpendicular direction, the cracks of other types propagated and coalesced near the lower side of the middle specimen. The research can provide guidance for controlling engineering disasters involving complex fissure combinations under natural geological conditions.
doi_str_mv 10.1061/(ASCE)GM.1943-5622.0002637
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In this paper, the peak strength and failure characteristics of rock-like materials with four types of double prefabricated fissure combinations was investigated by combining similar material tests of the digital image correlation (DIC) techniques and discrete-element numerical method (PFC2D). With reference to the experimental observation of crack initiation and propagation, the prefabricated fissure combination effect was analyzed by varying the fissure angle and its combination type. The results indicated that the mechanical properties of the specimen with prefabricated fissures were affected by the fissure inclination angle. When the double fissure inclination angles were 45°, the total fracture length was longest and the peak strength and the proportion of dissipated energy were smallest. It can be obtained that when the fissure inclination angle reached 45°, the effect of the prefabricated fissure combination was maximum. Except for the specimens whose fissure inclination angles had 90° cracks that processed along a perpendicular direction, the cracks of other types propagated and coalesced near the lower side of the middle specimen. 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In this paper, the peak strength and failure characteristics of rock-like materials with four types of double prefabricated fissure combinations was investigated by combining similar material tests of the digital image correlation (DIC) techniques and discrete-element numerical method (PFC2D). With reference to the experimental observation of crack initiation and propagation, the prefabricated fissure combination effect was analyzed by varying the fissure angle and its combination type. The results indicated that the mechanical properties of the specimen with prefabricated fissures were affected by the fissure inclination angle. When the double fissure inclination angles were 45°, the total fracture length was longest and the peak strength and the proportion of dissipated energy were smallest. It can be obtained that when the fissure inclination angle reached 45°, the effect of the prefabricated fissure combination was maximum. Except for the specimens whose fissure inclination angles had 90° cracks that processed along a perpendicular direction, the cracks of other types propagated and coalesced near the lower side of the middle specimen. The research can provide guidance for controlling engineering disasters involving complex fissure combinations under natural geological conditions.</description><subject>Compression</subject><subject>Compressive strength</subject><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>Cracks</subject><subject>Digital imaging</subject><subject>Disasters</subject><subject>Engineering</subject><subject>Inclination angle</subject><subject>Materials testing</subject><subject>Mathematical models</subject><subject>Mechanical properties</subject><subject>Numerical methods</subject><subject>Prefabrication</subject><subject>Rock</subject><subject>Rocks</subject><subject>Technical Papers</subject><issn>1532-3641</issn><issn>1943-5622</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp1kMtOAyEYRidGE-vlHYhudDGVywDirmm0NmmjsXZNKPOj2JapMJPoI_jWzlgvK1cQ8p1DcrLshOA-wYJcnA1mw-vz0bRPVMFyLijtY4ypYHIn6_2-7bZ3zmjOREH2s4OUXjAmsuCql32Mg1s1ECygyqH7CM4soremhhLd-JSaCGhYrRc-mNpXIaEqoFkdITzVz8iEdmT86mv0bKKxNUSfam9TZ3uo7DKf-CWg2QasX0OLN6GEiObBmzdvVp16EyGlVn2U7TmzSnD8fR5m85vrx-FtPrkbjYeDSW6okHVuVQlCSq4oJWUBhEqhhCOEOSqtcEo6awpOioUopGPu0jnFgbqSW-CSM8UOs9OtdxOr1wZSrV-qJob2S00lk0pQzHC7utqubKxSarPoTfRrE981wbpLr3WXXo-mususu8z6O30Liy1skoU__Q_5P_gJno6KMA</recordid><startdate>20230201</startdate><enddate>20230201</enddate><creator>Wang, Kezhong</creator><creator>Zhang, Chun</creator><creator>Gao, Yaohui</creator><creator>Chen, Hengjin</creator><creator>Xie, Tian</creator><general>American Society of Civil Engineers</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H96</scope><scope>KR7</scope><scope>L.G</scope><orcidid>https://orcid.org/0000-0002-7529-4133</orcidid><orcidid>https://orcid.org/0000-0002-8743-6733</orcidid></search><sort><creationdate>20230201</creationdate><title>Influence of Prefabricated Fissure Combinations on Strength and Failure Characteristics of Rock-Like Specimens under Uniaxial Compression</title><author>Wang, Kezhong ; Zhang, Chun ; Gao, Yaohui ; Chen, Hengjin ; Xie, Tian</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a267t-c9de67759221d4e127696f113f27c6f97fca4514b647f3f8ff95e2fd5ce575393</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Compression</topic><topic>Compressive strength</topic><topic>Crack initiation</topic><topic>Crack propagation</topic><topic>Cracks</topic><topic>Digital imaging</topic><topic>Disasters</topic><topic>Engineering</topic><topic>Inclination angle</topic><topic>Materials testing</topic><topic>Mathematical models</topic><topic>Mechanical properties</topic><topic>Numerical methods</topic><topic>Prefabrication</topic><topic>Rock</topic><topic>Rocks</topic><topic>Technical Papers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Kezhong</creatorcontrib><creatorcontrib>Zhang, Chun</creatorcontrib><creatorcontrib>Gao, Yaohui</creatorcontrib><creatorcontrib>Chen, Hengjin</creatorcontrib><creatorcontrib>Xie, Tian</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>International journal of geomechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Kezhong</au><au>Zhang, Chun</au><au>Gao, Yaohui</au><au>Chen, Hengjin</au><au>Xie, Tian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of Prefabricated Fissure Combinations on Strength and Failure Characteristics of Rock-Like Specimens under Uniaxial Compression</atitle><jtitle>International journal of geomechanics</jtitle><date>2023-02-01</date><risdate>2023</risdate><volume>23</volume><issue>2</issue><issn>1532-3641</issn><eissn>1943-5622</eissn><abstract>Abstract Owing to the uncertainty in the rock formation process, there are different forms of fissure combinations that significantly influence the stability of engineering. In this paper, the peak strength and failure characteristics of rock-like materials with four types of double prefabricated fissure combinations was investigated by combining similar material tests of the digital image correlation (DIC) techniques and discrete-element numerical method (PFC2D). With reference to the experimental observation of crack initiation and propagation, the prefabricated fissure combination effect was analyzed by varying the fissure angle and its combination type. The results indicated that the mechanical properties of the specimen with prefabricated fissures were affected by the fissure inclination angle. When the double fissure inclination angles were 45°, the total fracture length was longest and the peak strength and the proportion of dissipated energy were smallest. It can be obtained that when the fissure inclination angle reached 45°, the effect of the prefabricated fissure combination was maximum. 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source American Society of Civil Engineers:NESLI2:Journals:2014
subjects Compression
Compressive strength
Crack initiation
Crack propagation
Cracks
Digital imaging
Disasters
Engineering
Inclination angle
Materials testing
Mathematical models
Mechanical properties
Numerical methods
Prefabrication
Rock
Rocks
Technical Papers
title Influence of Prefabricated Fissure Combinations on Strength and Failure Characteristics of Rock-Like Specimens under Uniaxial Compression
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